red stuff growing on rock

[scub steve]

i got some red slimy looking stuff with bubbes in it any idea what it is?

[OCDP]

Sounds like cyanobacteria to me. AKA Cyano... ahh fun stuff!

Grab some airhose and start a siphon and remove all you can get at

[reeferaddict]

Yup, definitely cyano... problems we ALL have to deal with at one time or another... siphon out all that you can.... then try to find the root of the problem...

Cyano flourishes with high phosphate and nitrate levels... so maybe try cutting back on your feeding, or make sure something hasn't died... it also grows in low flow areas, so you can try changing and/or increasing flow... and lastly, a sudden cyano bloom can mean lights that are needing replacing...